The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation

C. Ruppert, A. Chernikov, H.M. Hill, A.F. Rigosi, T.F. Heinz, Nano Letters 17 (2017) 644–651.

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Journal Article | Published | English
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Abstract
Transient changes of the optical response of WS2 monolayers are studied by femtosecond broadband pump–probe spectroscopy. Time-dependent absorption spectra are analyzed by tracking the line width broadening, bleaching, and energy shift of the main exciton resonance as a function of time delay after the excitation. Two main sources for the pump-induced changes of the optical response are identified. Specifically, we find an interplay between modifications induced by many-body interactions from photoexcited carriers and by the subsequent transfer of the excitation to the phonon system followed by cooling of the material through the heat transfer to the substrate.
Publishing Year
Journal Title
Nano Letters
Volume
17
Issue
2
Page
644-651
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Ruppert C, Chernikov A, Hill HM, Rigosi AF, Heinz TF. The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation. Nano Letters. 2017;17(2):644-651. doi:10.1021/acs.nanolett.6b03513
Ruppert, C., Chernikov, A., Hill, H. M., Rigosi, A. F., & Heinz, T. F. (2017). The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation. Nano Letters, 17(2), 644–651. https://doi.org/10.1021/acs.nanolett.6b03513
@article{Ruppert_Chernikov_Hill_Rigosi_Heinz_2017, title={The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation}, volume={17}, DOI={10.1021/acs.nanolett.6b03513}, number={2}, journal={Nano Letters}, publisher={American Chemical Society (ACS)}, author={Ruppert, Claudia and Chernikov, Alexey and Hill, Heather M. and Rigosi, Albert F. and Heinz, Tony F.}, year={2017}, pages={644–651} }
Ruppert, Claudia, Alexey Chernikov, Heather M. Hill, Albert F. Rigosi, and Tony F. Heinz. “The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation.” Nano Letters 17, no. 2 (2017): 644–51. https://doi.org/10.1021/acs.nanolett.6b03513.
C. Ruppert, A. Chernikov, H. M. Hill, A. F. Rigosi, and T. F. Heinz, “The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation,” Nano Letters, vol. 17, no. 2, pp. 644–651, 2017.
Ruppert, Claudia, et al. “The Role of Electronic and Phononic Excitation in the Optical Response of Monolayer WS2 after Ultrafast Excitation.” Nano Letters, vol. 17, no. 2, American Chemical Society (ACS), 2017, pp. 644–51, doi:10.1021/acs.nanolett.6b03513.

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